CN105506009B - Method and system for preparing biodiesel by culturing algae by using power plant exhaust smoke and ash - Google Patents
Method and system for preparing biodiesel by culturing algae by using power plant exhaust smoke and ash Download PDFInfo
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- CN105506009B CN105506009B CN201510988037.4A CN201510988037A CN105506009B CN 105506009 B CN105506009 B CN 105506009B CN 201510988037 A CN201510988037 A CN 201510988037A CN 105506009 B CN105506009 B CN 105506009B
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- 241000195493 Cryptophyta Species 0.000 title claims abstract description 163
- 239000003225 biodiesel Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012258 culturing Methods 0.000 title claims abstract description 17
- 239000000779 smoke Substances 0.000 title claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 86
- 239000002002 slurry Substances 0.000 claims abstract description 36
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003546 flue gas Substances 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
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- 239000002956 ash Substances 0.000 claims description 26
- 238000005286 illumination Methods 0.000 claims description 24
- 238000000605 extraction Methods 0.000 claims description 15
- 150000003839 salts Chemical class 0.000 claims description 13
- 230000008676 import Effects 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 4
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- 238000010438 heat treatment Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 14
- 229910002092 carbon dioxide Inorganic materials 0.000 description 12
- 239000001569 carbon dioxide Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000001963 growth medium Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000029553 photosynthesis Effects 0.000 description 2
- 238000010672 photosynthesis Methods 0.000 description 2
- 206010021033 Hypomenorrhoea Diseases 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
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- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 230000000243 photosynthetic effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- C12P7/64—Fats; Fatty oils; Ester-type waxes; Higher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl group; Oxidised oils or fats
- C12P7/6436—Fatty acid esters
- C12P7/649—Biodiesel, i.e. fatty acid alkyl esters
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Abstract
The invention discloses a method and a system for preparing biodiesel by culturing algae by using power plant exhaust smoke and ash, comprising the following steps of: preparing an algae culture solution by taking ash and boiler circulating water generated by power plant boiler combustion as main components of the algae culture solution; delivering the algae culture solution to an algae culture container, shunting the flue gas discharged by the power plant boiler, and shunting the shunted CO2Feeding into an algae culture container and providing culture conditions required by algae culture; crushing and cutting large-sized seaweeds in the cultured mature algal flora, and stirring and mixing the large-sized seaweeds with microalgae in the cultured mature algal flora to form algal slurry; and (3) conveying the algae slurry to a high-pressure reaction kettle, and introducing fourth-stage extracted steam of a steam turbine of the power plant into the high-pressure reaction kettle until the high-pressure reaction kettle is in a supercritical state, so that the algae is subjected to hydrothermal liquefaction reaction to generate biodiesel. The invention fully utilizes various resources of the power plant, efficiently converts the resources into usable resources, reduces the cost of algae culture and biodiesel preparation, and improves the energy utilization efficiency.
Description
Technical Field
The invention belongs to an energy utilization technology, relates to a process for cultivating algae and preparing biodiesel, and particularly relates to a method for preparing biodiesel by cultivating algae by using power plant exhaust smoke and ash, and a system using the method.
Background
The production and consumption of coal in China have a great proportion in the world. Coal-fired power generation still occupies the dominant position in various domestic power generation forms. However, coal-fired power generation has the following problems:
making coal burn to produce CO2The negative influence of greenhouse effect and the like on the environment is increased by the smoke with equal components, so the treatment of the smoke and the CO2Have received extensive attention from the industry.
The coal consumption of the power plant is huge, and if the ash generated by combustion cannot be fully recycled, resources are wasted, and the environment is polluted.
Since coal-fired power generation has the above problems, how to fully utilize flue gas and ash discharged from power plants and convert them into usable resources is not only a technical problem to be solved in the industry, but also an important issue to be paid much attention and studied all over the world.
The existing method for utilizing the flue gas and the ash discharged by the power plant only utilizes the flue gas or the ash, so that the energy utilization efficiency is not high, and the related equipment structure is complex and high in cost, and is not suitable for wide popularization and application.
Disclosure of Invention
The first purpose of the invention is to provide a method for preparing biodiesel by culturing algae with the smoke discharged from the power plant and the ash content, which can improve the energy utilization efficiency of the power plant, greatly reduce the environmental pollution degree and greatly save the cost of culturing algae and preparing biodiesel.
The second purpose of the invention is to provide a system for preparing biodiesel by using the method for preparing the biodiesel by culturing algae by using the power plant exhaust smoke and ash.
The first purpose of the invention is realized by the following technical scheme: a method for preparing biodiesel by culturing algae by using power plant exhaust smoke and ash is characterized by comprising the following steps:
preparing algae culture solution: preparing an algae culture solution by taking ash and boiler circulating water generated by power plant boiler combustion as main components of the algae culture solution;
culturing algae: delivering the algae culture solution to the algaeIn the culture container, the flue gas discharged by the power plant boiler is divided, and the divided CO is2Sending into an algae culture container, providing culture conditions required by algae culture, and performing algae culture;
thirdly, preparing algae slurry: crushing and cutting large-sized seaweeds in the cultured mature algal flora, and stirring and mixing the large-sized seaweeds with microalgae in the cultured mature algal flora to form algal slurry;
preparing biodiesel: and (3) conveying the algae slurry to a high-pressure reaction kettle, and introducing fourth-stage extracted steam of a steam turbine of the power plant into the high-pressure reaction kettle until the high-pressure reaction kettle is in a supercritical state, so that the algae is subjected to hydrothermal liquefaction reaction to generate biodiesel.
Algae is an autotrophic plant with wide land and sea distribution and high photosynthetic availability. The algae is rich in esters and glycerin, is a good raw material for preparing liquid fuel, and can be used for preparing biodiesel. The biomass hydrothermal liquefaction reaction is a process for preparing biodiesel by converting biomass with supercritical water (the critical temperature is 374.3 ℃ and the critical pressure is 22.1 MPa). Supercritical water is a compressible high-density fluid, has properties close to that of a nonpolar organic solvent, and can be mutually soluble with most organic matters and gases.
The ash generated by the combustion of a power plant boiler contains various mineral components required by algae culture solution, the circulating water of the boiler contains nutrients required by phosphate and the like, and the mineral components and the VSE culture medium (the prior art comprises NaNO)3，NaHPO4·12H2O, etc.) are processed together to prepare the algae culture solution, thereby not only reducing the cost of algae culture and biodiesel preparation, but also solving the problem of treatment of combustion ash. In addition, the flue gas produced by combustion contains a relatively high concentration of CO2It can be utilized by algae photosynthesis to promote algae cultivation. In addition, the fourth-stage steam extraction of the steam turbine of the power plant can realize the supercritical state required by the high-pressure reaction kettle of the hydrothermal liquefaction reaction.
The invention fully utilizes various resources of the power plant on the premise of not influencing the operation stability of the power plant, efficiently converts the resources into usable resources, reduces the cost of algae culture and biodiesel preparation, improves the energy utilization efficiency of the power plant and greatly reduces the environmental pollution degree.
In the second step of the present invention, the culture conditions include light intensity, light cycle, temperature, and CO2Concentration and pH of the algae culture.
As an improvement of the present invention, in the step fourth, the step of transferring the algae slurry to the high-pressure reaction vessel includes the steps of: opening a first-stage valve of the high-pressure reaction kettle, introducing the algae slurry from a feed inlet of the high-pressure reaction kettle, closing the first-stage valve, then opening a second-stage valve, and feeding the algae slurry between the first-stage valve and the second-stage valve into the high-pressure reaction kettle to avoid high-pressure steam countercurrent.
As a further improvement of the present invention, in the step fourth, introducing fourth-stage extraction steam of the power plant turbine into the high-pressure reactor includes the following steps: divide into two strands with the fourth stage extraction steam of steam turbine and let in the high pressure batch autoclave respectively and in the salt bath around the high pressure batch autoclave, after the steam pressure that lets in the high pressure batch autoclave reached the fourth stage extraction steam pressure of steam turbine, close the valve that steam got into the high pressure batch autoclave, and the steam that lets in the salt bath then continuously heats the high pressure batch autoclave until the temperature of high pressure batch autoclave is the same with the temperature of salt bath.
The ratio of the volume of the algae slurry to the volume of the high-pressure reaction kettle is 1: 3-4: 5, after the temperature of the high-pressure reaction kettle reaches the temperature of the salt bath, the pressure in the high-pressure reaction kettle is 10-30 Mpa, and the algae is subjected to hydrothermal liquefaction reaction for 5-10 min to generate the biodiesel.
The second purpose of the invention is realized by the following technical scheme: a system for using the method for preparing biodiesel by culturing algae by using the power plant exhaust smoke and ash is characterized in that: it includes that the algae who communicates in proper order has import and export respectively and cultivates modulating device, algae culture container, smashes cutting equipment, agitated vessel and high-pressure batch autoclave, the import of algae cultivation modulating device is including the ash content import that is used for inputing power plant's boiler burning production ash content and the circulating water import that is used for inputing the boiler circulating water, the import package of algae culture containerComprises a feed inlet for feeding algae culture solution and a CO inlet for feeding flue gas discharged from a power plant boiler2The inlet port of the high-pressure reaction kettle, be equipped with the illumination device who is used for providing illumination intensity in the algae cultivation container, high-pressure reaction kettle's import is including being used for inputting power plant's steam turbine fourth grade steam extraction's steam inlet and the feed inlet that is used for inputting the algae thick liquid, and the algae culture solution of modulating in the algae cultivation modulation device is carried to algae cultivation container and is carried out the algae cultivation, and the macroalgae who cultivates in the ripe algae crowd is carried and is smashed and cut in smashing cutting equipment, mixes at the agitated vessel stirring with the little algae of cultivateing in the ripe algae crowd and send into high-pressure reaction kettle after forming the algae thick liquid, and the fourth grade steam extraction that introduces the power plant's steam turbine by high-pressure reaction kettle is in supercritical state until high-pressure reaction kettle to make algae carry out hydrothermal liquefaction reaction and generate biodiesel and discharge from the export.
According to the invention, an algae slurry pond is arranged between the stirring equipment and the high-pressure reaction kettle, and the algae slurry pond is respectively communicated with the outlet of the stirring equipment and the feed inlet of the high-pressure reaction kettle.
As an improvement of the invention, a feeding device is additionally arranged on a feeding hole of the high-pressure reaction kettle, an included angle of 40-50 degrees is formed between the feeding device and the high-pressure reaction kettle, a primary valve of the high-pressure reaction kettle is opened, the feeding device conveys the algae slurry into the feeding hole, a secondary valve is opened after the primary valve is closed, the algae slurry naturally falls into the high-pressure reaction kettle by means of self gravity, and the backflow of high-pressure steam can be avoided.
In a preferred embodiment of the present invention, the illumination device is powered by a solar cell, the lamp body of the illumination device is an LED lamp, the illumination device is located on the top of the algae culture container, and the illumination device is automatically activated to supplement illumination when the illumination is insufficient.
In a preferred embodiment of the present invention, the plurality of air inlet holes are distributed on the side wall of the algae cultivation container, and the aperture of the air inlet holes is 1-3 mm.
Compared with the prior art, the invention has the following remarkable technical effects:
the invention processes the ash generated by combustion of a power plant boiler and VSE culture medium together to prepare the algae culture solution, and the flue gas generated by combustion of the power plant boiler contains CO2 with higher concentration, which can be utilized by algae photosynthesis to promote algae culture, thereby reducing the cost of algae culture and solving the problems of coal combustion ash and CO2 treatment.
The fourth-stage steam extraction of the power plant boiler steam turbine is high-pressure steam which partially does work, and the supercritical state required by the high-pressure reaction kettle of the hydrothermal liquefaction reaction can be realized.
According to the invention, on the premise of not influencing the operation stability of the power plant, various resources of the power plant are fully utilized, the resources are efficiently converted into available resources, the cost of algae culture and biodiesel preparation is reduced, the energy utilization efficiency of the power plant is improved, and the environmental pollution degree is greatly reduced.
An included angle of 40-50 degrees is formed between the feeding device and the high-pressure reaction kettle, so that the algae slurry between the first-stage valve and the second-stage valve naturally falls into the high-pressure reaction kettle by means of self gravity, and the high-pressure steam is prevented from flowing reversely.
The system has the advantages of simple structure, easiness in implementation, strong practicability and convenience in wide popularization and application.
Drawings
The invention is described in further detail below with reference to the figures and the specific embodiments.
FIG. 1 is a schematic diagram of the structure of the system of the present invention.
Detailed Description
The invention relates to a method for preparing biodiesel by culturing algae by using power plant exhaust smoke and ash, which comprises the following steps:
preparing algae culture solution: preparing an algae culture solution by taking ash and boiler circulating water generated by power plant boiler combustion as main components of the algae culture solution;
culturing algae: delivering the algae culture solution to an algae culture container, shunting the flue gas discharged by the power plant boiler, and shunting the shunted CO2Feeding into algae culture container, and providing culture conditions for algae culture, wherein the culture conditions include light intensity, light period, temperature, CO2 concentration and pH of algae culture solution.
Thirdly, preparing algae slurry: crushing and cutting large-sized seaweeds in the cultured mature algal flora, and stirring and mixing the large-sized seaweeds with microalgae in the cultured mature algal flora to form algal slurry;
preparing biodiesel: conveying the algae slurry to a high-pressure reaction kettle, specifically: opening a first-stage valve of the high-pressure reaction kettle, introducing the algae slurry from a feed inlet of the high-pressure reaction kettle, closing the first-stage valve, then opening a second-stage valve, and feeding the algae slurry between the first-stage valve and the second-stage valve into the high-pressure reaction kettle to avoid high-pressure steam countercurrent. The fourth-stage extraction steam of the steam turbine of the power plant is introduced into the high-pressure reaction kettle, and the method specifically comprises the following steps: divide into two strands with the fourth stage extraction steam of steam turbine and let in the high pressure batch autoclave and the salt bath around the high pressure batch autoclave respectively, after the steam pressure that lets in high pressure batch autoclave reached the fourth stage extraction steam pressure of steam turbine, close the valve that steam got into high pressure batch autoclave, and the steam that lets in the salt bath then continuously heats high pressure batch autoclave, until high pressure batch autoclave's temperature is the same with the temperature of salt bath, until high pressure batch autoclave is in supercritical state (critical temperature 374.3 ℃, critical pressure 22.1MPa), so that the alga carries out hydrothermal liquefaction reaction, the volume of alga thick liquid is 1 with high pressure batch autoclave's volume ratio: and 3, after the temperature of the high-pressure reaction kettle reaches the temperature of the salt bath, the pressure in the high-pressure reaction kettle is 22Mpa and is close to the critical value, and the hydrothermal liquefaction reaction is carried out for 6min to generate the biodiesel.
As shown in figure 1, the system for preparing the biodiesel by using the method for culturing the algae by using the exhaust gas and the ash content of the power plant comprises an algae culture modulation device 7, an algae culture container 1, a crushing and cutting device, a stirring device, an algae slurry pool 2 and a high-pressure reaction kettle 3 which are sequentially communicated, wherein the algae slurry pool 2 is respectively communicated with the stirring device and the high-pressure reaction kettle 3, and the algae culture modulation device and the algae culture container are respectively communicated with each otherThe inlets of the culture and preparation device 7 comprise an ash inlet for inputting ash A generated by the combustion of a boiler of a power plant and a circulating water inlet for inputting circulating water B of the boiler, in the embodiment, the algae culture containers 1 are 4 and are respectively communicated with the algae culture and preparation device 7, and the inlets of the algae culture containers 1 comprise a feed inlet for feeding algae culture solution and a carbon dioxide (CO) inlet for inputting flue gas discharged from the boiler of the power plant2) A plurality of air inlets are distributed on the side wall of the algae cultivation container 1, and the aperture of each air inlet is 2 mm. The algae culture container 1 is a cylindrical culture container which is vertically arranged side by side, an illumination device 4 used for providing illumination intensity for algae culture is arranged in the algae culture container 1, a lamp body of the illumination device 4 is an LED lamp, the illumination device 4 is positioned at the top of the algae culture container 1, and the illumination device 4 is automatically started to illuminate and complement when illumination is insufficient. The inlet of the high-pressure reaction kettle 3 comprises a steam inlet for inputting the fourth-stage extraction steam D of the steam turbine of the power plant and a feed inlet for inputting the algae slurry, and the high-pressure reaction kettle 3 is provided with a pressure gauge 8.
The algae culture solution prepared in the algae culture preparation apparatus 7 is transferred to the algae culture vessel 1 for algae culture, the macroalgae in the cultured mature algae group is transferred to the pulverizing and cutting device for pulverizing and cutting, stirring and mixing with microalgae (not pulverizing) in cultured mature algae group in stirring equipment to form algae slurry, feeding into high pressure reaction kettle 3, collecting the algae slurry in algae slurry pool 2, the algae slurry is conveyed into the high-pressure reaction kettle 3 through a feed inlet of the high-pressure reaction kettle 3, the fourth-stage extraction steam (1.156MPa, 395.5 ℃) of a power plant steam turbine 5 is introduced into a steam inlet of the high-pressure reaction kettle 3 until the high-pressure reaction kettle 3 is in a supercritical state, so that the algae is subjected to hydrothermal liquefaction reaction to generate biodiesel, and the biodiesel is discharged from the outlet, wherein the outlet comprises an exhaust port and an oil discharge port, gas generated by the reaction is discharged from the exhaust port, and the biodiesel is discharged from the oil discharge port.
Be equipped with feeder on high pressure batch autoclave's feed inlet, feeder and high pressure batch autoclave are 45 contained angles, open high pressure batch autoclave's one-level valve, and feeder carries the algae thick liquid to get into the feed inlet, opens the second grade valve after closing the one-level valve, and the algae thick liquid relies on self gravity to fall to high pressure batch autoclave naturally, can avoid high-pressure steam to flow against the current.
According to the above-mentioned contents of the present invention, according to the general technical knowledge and conventional means in the art, without departing from the basic technical idea of the present invention, the ratio of the volume of the algae slurry to the volume of the high-pressure reaction kettle is 1:3 to 4:5, after the temperature of the high-pressure reaction kettle reaches the temperature of the salt bath, the pressure in the high-pressure reaction kettle is 10 to 30Mpa, and the algae undergoes hydrothermal liquefaction reaction for 5 to 10min to generate biodiesel; the feeding device and the high-pressure reaction kettle form an included angle of 40-50 degrees; the aperture of the air inlet hole on the algae culture container is 1-3 mm. Therefore, the present invention may be modified, replaced or changed in various other ways, which fall within the scope of the appended claims.
Claims (8)
1. A method for preparing biodiesel by culturing algae by using power plant exhaust smoke and ash is characterized by comprising the following steps:
preparing algae culture solution: preparing an algae culture solution by taking ash and boiler circulating water generated by power plant boiler combustion as main components of the algae culture solution;
culturing algae: delivering the algae culture solution to an algae culture container, shunting the flue gas discharged by the power plant boiler, and shunting the shunted CO2Sending into an algae culture container, providing culture conditions required by algae culture, and performing algae culture;
thirdly, preparing algae slurry: crushing and cutting large-sized seaweeds in the cultured mature algal flora, and stirring and mixing the large-sized seaweeds with microalgae in the cultured mature algal flora to form algal slurry;
preparing biodiesel: conveying the algae slurry into a high-pressure reaction kettle, introducing fourth-stage extracted steam of a steam turbine of the power plant into the high-pressure reaction kettle until the high-pressure reaction kettle is in a supercritical state, and performing hydrothermal liquefaction reaction on the algae to generate biodiesel; the step of conveying the algae slurry to the high-pressure reaction kettle comprises the following steps: opening a first-stage valve of the high-pressure reaction kettle, introducing the algae slurry from a feed inlet of the high-pressure reaction kettle, closing the first-stage valve, then opening a second-stage valve, and feeding the algae slurry between the first-stage valve and the second-stage valve into the high-pressure reaction kettle; the method for introducing the fourth-stage extracted steam of the steam turbine of the power plant into the high-pressure reaction kettle comprises the following steps: dividing the fourth-stage extraction steam of the steam turbine into two streams, respectively introducing the two streams into the high-pressure reaction kettle and the salt bath around the high-pressure reaction kettle, closing a valve for introducing the steam into the high-pressure reaction kettle after the steam pressure introduced into the high-pressure reaction kettle reaches the fourth-stage extraction steam pressure of the steam turbine, and continuously heating the high-pressure reaction kettle by the steam introduced into the salt bath until the temperature of the high-pressure reaction kettle is the same as that of the salt bath.
2. The method for preparing biodiesel by culturing algae with the flue gas and ash of the power plant as claimed in claim 1, wherein: in the step two, the culture conditions comprise illumination intensity, illumination period, temperature and CO2Concentration and pH of the algae culture.
3. The method for preparing biodiesel by culturing algae with the flue gas and ash of the power plant as claimed in claim 2, wherein: the ratio of the volume of the algae slurry to the volume of the high-pressure reaction kettle is 1: 3-4: 5, after the temperature of the high-pressure reaction kettle reaches the temperature of the salt bath, the pressure in the high-pressure reaction kettle is 10-30 Mpa, and the algae is subjected to hydrothermal liquefaction reaction for 5-10 min to generate the biodiesel.
4. A system for preparing biodiesel by culturing algae with the flue gas of a power plant and ash according to claim 1, wherein the system comprises: it is including having the algae cultivation modulating device of import and export, algae cultivation container, crushing cutting equipment, agitated vessel and high-pressure batch autoclave that communicate in proper order respectively, the import of algae cultivation modulating device is including the ash content import that is used for inputing power plant boiler burning production ash content and the circulating water import that is used for inputing the boiler circulating water, the import of algae cultivation container is including the feed inlet that is used for sending into the algae culture solution and the CO who is used for the input to come from power plant boiler exhaust flue gas that is imported and is used for2The algae culture container is internally provided with an illumination device for providing illumination intensity, and the inlet of the high-pressure reaction kettle comprises a fourth inlet for inputting a steam turbine of a power plantThe algae culture solution prepared in the algae culture and regulation device is conveyed to an algae culture container for algae culture, the large-scale algae in the cultured mature algae group are conveyed to a crushing and cutting device for crushing and cutting, the algae culture solution and the microalgae in the cultured mature algae group are stirred and mixed in a stirring device to form algae slurry and then are conveyed into a high-pressure reaction kettle, fourth-stage steam extraction of a steam turbine of a power plant is introduced from a steam inlet of the high-pressure reaction kettle until the high-pressure reaction kettle is in a supercritical state, so that the algae is subjected to hydrothermal liquefaction reaction to generate biodiesel and is discharged from an outlet.
5. The system of claim 4, wherein: an algae slurry pond is arranged between the stirring equipment and the high-pressure reaction kettle and is respectively communicated with the outlet of the stirring equipment and the feed inlet of the high-pressure reaction kettle.
6. The system of claim 5, wherein: add feeder on high-pressure batch autoclave's the feed inlet, feeder and high-pressure batch autoclave are 40 ~ 50 contained angles, open high-pressure batch autoclave's one-level valve, and feeder carries the algae thick liquid to get into the feed inlet, opens the second grade valve after closing the one-level valve, and the algae thick liquid relies on self gravity to fall naturally to high-pressure batch autoclave in.
7. The system of claim 6, wherein: the illumination device is powered by a solar cell, a lamp body of the illumination device is an LED lamp, the illumination device is positioned at the top of the algae culture container, and the illumination device is automatically started to supply illumination when the illumination is insufficient.
8. The system of claim 7, wherein: the air inlets on the algae culture container are distributed on the side wall of the algae culture container, and the aperture of each air inlet is 1-3 mm.
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| EP1928994A2 (en) * | 2005-08-25 | 2008-06-11 | Solix Biofuels, Inc. | Method, apparatus and system for biodiesel production from algae |
| CN101386799A (en) * | 2008-10-28 | 2009-03-18 | 蔡志武 | Production method of culture algae and refinery coupling planting grass, power generation and heat supply |
| CN101591573A (en) * | 2009-07-02 | 2009-12-02 | 复旦大学 | A method for preparing liquid fuel by hydrothermally liquefying algae |
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| EP1928994A2 (en) * | 2005-08-25 | 2008-06-11 | Solix Biofuels, Inc. | Method, apparatus and system for biodiesel production from algae |
| CN101386799A (en) * | 2008-10-28 | 2009-03-18 | 蔡志武 | Production method of culture algae and refinery coupling planting grass, power generation and heat supply |
| CN101591573A (en) * | 2009-07-02 | 2009-12-02 | 复旦大学 | A method for preparing liquid fuel by hydrothermally liquefying algae |
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